<template>
  <div class="main">
    <a-form
            id="formLogin"
            class="user-layout-login"
            ref="formLogin"
            :form="form"
            @submit="handleSubmit"
    >
      <a-tabs
              :activeKey="customActiveKey"
              :tabBarStyle="{ textAlign: 'center', borderBottom: 'unset' }"
              @change="handleTabClick"
      >
        <a-tab-pane key="tab1" :tab="$t('user.login.tab-login-credentials')">
          <a-alert v-if="isLoginError" type="error" showIcon style="margin-bottom: 24px;"
                   :message="$t('user.login.message-invalid-credentials')"/>
          <a-form-item>
            <a-input
                    size="large"
                    type="text"
                    :placeholder="$t('user.login.username.placeholder')"
                    v-decorator="[
                'username',
                {rules: [{ required: true, message: $t('user.userName.required') }, { validator: handleUsernameOrEmail }], validateTrigger: 'change'}
              ]"
            >
              <a-icon slot="prefix" type="user" :style="{ color: 'rgba(0,0,0,.25)' }"/>
            </a-input>
          </a-form-item>

          <a-form-item>
            <a-input-password
                    size="large"
                    :placeholder="$t('user.login.password.placeholder')"
                    v-decorator="[
                'password',
                {rules: [{ required: true, message: $t('user.password.required') }], validateTrigger: 'blur'}
              ]"
            >
              <a-icon slot="prefix" type="lock" :style="{ color: 'rgba(0,0,0,.25)' }"/>
            </a-input-password>
          </a-form-item>
        </a-tab-pane>
      </a-tabs>

      <a-form-item>
        <a-row>
          <a-col :span="8">
            <a-checkbox v-decorator="['rememberMe', { valuePropName: 'checked' }]">
              {{ $t('user.login.remember-me') }}
            </a-checkbox>
          </a-col>
          <a-col :span="8" style="text-align: center">
            <router-link class="register" :to="{ name: 'register' }">新用户注册</router-link>
          </a-col>
          <a-col :span="8">
            <router-link
                    :to="{ name: 'recover', params: { user: 'aaa'} }"
                    class="forge-password"
                    style="float: right;"
            >{{ $t('user.login.forgot-password') }}
            </router-link>
          </a-col>
        </a-row>
      </a-form-item>

      <a-form-item style="margin-top:24px">
        <a-button
                size="large"
                type="primary"
                htmlType="submit"
                class="login-button"
                :loading="state.loginBtn"
                :disabled="state.loginBtn"
        >{{ $t('user.login.login') }}
        </a-button>
      </a-form-item>
    </a-form>

    <two-step-captcha
            v-if="requiredTwoStepCaptcha"
            :visible="stepCaptchaVisible"
            @success="stepCaptchaSuccess"
            @cancel="stepCaptchaCancel"
    ></two-step-captcha>
  </div>
</template>

<script>
  import md5 from 'md5'
  import TwoStepCaptcha from '@/components/tools/TwoStepCaptcha'
  import { mapActions } from 'vuex'
  import { timeFix } from '@/utils/util'
  import { getSmsCaptcha, get2step } from '@/api/login'

  export default {
    components: {
      TwoStepCaptcha
    },
    data() {
      return {
        customActiveKey: 'tab1',
        loginBtn: false,
        // login type: 0 email, 1 username, 2 telephone
        loginType: 0,
        isLoginError: false,
        requiredTwoStepCaptcha: false,
        stepCaptchaVisible: false,
        form: this.$form.createForm(this),
        state: {
          time: 60,
          loginBtn: false,
          // login type: 0 email, 1 username, 2 telephone
          loginType: 0,
          smsSendBtn: false
        }
      }
    },
    created() {
      // get2step({})
      //   .then(res => {
      //     this.requiredTwoStepCaptcha = res.result.stepCode
      //   })
      //   .catch(() => {
      //     this.requiredTwoStepCaptcha = false
      //   })
      // this.requiredTwoStepCaptcha = true
    },
    methods: {
      ...mapActions(['Login', 'Logout']),
      // handler
      handleUsernameOrEmail(rule, value, callback) {
        const { state } = this
        const regex = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+((\.[a-zA-Z0-9_-]{2,3}){1,2})$/
        if (regex.test(value)) {
          state.loginType = 0
        } else {
          state.loginType = 1
        }
        callback()
      },
      handleTabClick(key) {
        this.customActiveKey = key
        // this.form.resetFields()
      },
      handleSubmit(e) {
        e.preventDefault()
        const {
          form: { validateFields },
          state,
          customActiveKey,
          Login
        } = this

        state.loginBtn = true

        const validateFieldsKey = customActiveKey === 'tab1' ? ['username', 'password'] : ['mobile', 'captcha']

        validateFields(validateFieldsKey, { force: true }, (err, values) => {
          if (!err) {
            const loginParams = { ...values }
            delete loginParams.username
            loginParams[!state.loginType ? 'email' : 'username'] = values.username
            loginParams.password = values.password
            Login(loginParams)
              .then((res) => this.loginSuccess(res))
              // .catch(err => this.requestFailed(err))
              .finally(() => {
                state.loginBtn = false
              })
          } else {
            setTimeout(() => {
              state.loginBtn = false
            }, 600)
          }
        })
      },
      getCaptcha(e) {
        e.preventDefault()
        const { form: { validateFields }, state } = this

        validateFields(['mobile'], { force: true }, (err, values) => {
          if (!err) {
            state.smsSendBtn = true

            const interval = window.setInterval(() => {
              if (state.time-- <= 0) {
                state.time = 60
                state.smsSendBtn = false
                window.clearInterval(interval)
              }
            }, 1000)

            const hide = this.$message.loading('验证码发送中..', 0)
            getSmsCaptcha({ mobile: values.mobile }).then(res => {
              setTimeout(hide, 2500)
              this.$notification['success']({
                message: '提示',
                description: '验证码获取成功，您的验证码为：' + res.result.captcha,
                duration: 8
              })
            }).catch(err => {
              setTimeout(hide, 1)
              clearInterval(interval)
              state.time = 60
              state.smsSendBtn = false
              this.requestFailed(err)
            })
          }
        })
      },
      stepCaptchaSuccess() {
        this.loginSuccess()
      },
      stepCaptchaCancel() {
        this.Logout().then(() => {
          this.loginBtn = false
          this.stepCaptchaVisible = false
        })
      },
      loginSuccess(res) {
        console.log(res)
        // check res.homePage define, set $router.push name res.homePage
        // Why not enter onComplete
        /*
        this.$router.push({ name: 'analysis' }, () => {
          console.log('onComplete')
          this.$notification.success({
            message: '欢迎',
            description: `${timeFix()}，欢迎回来`
          })
        })
        */
        this.$router.push({ path: '/' })
        // 延迟 1 秒显示欢迎信息
        setTimeout(() => {
          this.$notification.success({
            message: '欢迎',
            description: `${timeFix()}，欢迎回来`
          })
        }, 1000)
        this.isLoginError = false
      },
      requestFailed(err) {
        this.isLoginError = true
        this.$notification['error']({
          message: '错误',
          description: err.description || err.message || '请求出现错误，请稍后再试',
          duration: 4
        })
      }
    }
  }
</script>

<style lang="less" scoped>
  .user-layout-login {
    label {
      font-size: 14px;
    }

    .getCaptcha {
      display: block;
      width: 100%;
      height: 40px;
    }

    .forge-password {
      font-size: 14px;
    }

    button.login-button {
      padding: 0 15px;
      font-size: 16px;
      height: 40px;
      width: 100%;
    }

    .user-login-other {
      text-align: left;
      margin-top: 24px;
      line-height: 22px;

      .item-icon {
        font-size: 24px;
        color: rgba(0, 0, 0, 0.2);
        margin-left: 16px;
        vertical-align: middle;
        cursor: pointer;
        transition: color 0.3s;

        &:hover {
          color: #1890ff;
        }
      }

      .register {
        float: right;
      }
    }
  }
</style>
